A. 1 B. 2 C. 3 D. 5 E. 6 相关知识点: 试题来源: 解析 D 翻译:从集合{1,2,3,4,5,6,7,8,9,10,11}中去掉两个数,使得剩下所有数字的平均数是6,一共有( )多少种方法? 11个数中去掉两个数剩下9个数,平均数是6,总和6×9=54,原总和是1+2+⋯+11=66,所以66−54=12,12是去掉...
How many subsets of two elements can be removed from the set {1,2,3,4,5,6,7,8,9,10,11} so that the mean (average)of the remaining numbers is ?( ). A. 1 B. 2 C. 3 D. 5 E. 6 相关知识点: 试题来源: 解析 D 有多少个二元子集,使之从{1,2,3,4,5,6,7,8,9,10,...
The total number of subsets of a set withnelements is2n.To see why this is true, we observe that the number of subsets is equal to the number of ways a subset can be formed. To form a subset, we must decide whether each element of the set is "in" the subset...
In probability theory, subsets are used to count favorable outcomes and calculate probabilities. The number of subsets with a specific number of elements determines the likelihood of obtaining a particular combination from a larger set. Answer and Explanation:1 ...
The subsets of the set {w, x, y} are {w}, {x}, {y}, {w,x}, {w,y}, {x,y}, {w,x,y}, and { } (the empty subset). How many subsets of the set {w,x,y,z} containw? 选项: A、Four B、Five C、Seven D、Eight ...
【题目】How many subsets containing three different number s can be selected from the set {89,95,99,132,166,173}so that the sum of the three numbers is even?(). A.6 B.8 C.10 D.12 E.24 相关知识点: 试题来源: 解析 【解析】D ...
How many subsets containing three different numbers can be selected from the set {89,95,99,132,166,173} so that the sum of the three numbers is even?( ).A.6B.8C.10D.12E.24 答案 D从集合{89,95,99,132,166,173}中可以选择多少个包含三个不同数字的子集,使这三个数字的和是偶数?要得到...
How many sets of three numbers are there from a set of n numbers? How many elements are in the intersection of sets A' and B? What are the subsets of rational numbers? how many ternary (0, 1, 2) sequences of length 10 are there without any pair o...
The subset is a set such that all of its elements are contained in another set. Given a set, then there are two possibilities for each element - the element is either in the subset or it isn't. Thus, there are 2n subsets of a given set, where n is the ...
How many elements are in the intersection of sets A' and B? How many sets of three numbers are there from a set of n numbers? How many 4-element subsets of the set S = \{1,2,3...,10\} contain no consecutive integers? How many relations are there...